Figure 2From: The effect of earplugs during the night on the onset of delirium and sleep perception: a randomized controlled trial in intensive care patientsNEECHAM categories observed for the study (earplugs) and the control group (no earplugs) using the worst score during the observation period of maximum five nights. Chi2 for difference between earplugs and no earplugs: P = 0.006.Back to article page